60results about How to "Simple ingredients" patented technology

The invention discloses an Mg + Nb co-doped TiO2 giant dielectric ceramic material and a preparation method thereof, and relates to the technical field of giant dielectric materials. The (Mg + Nb) co-doped TiO2 ceramic is successfully prepared by adopting a traditional solid phase method, the performance of the TiO2-based giant dielectric ceramic is regulated and controlled through a new doping strategy, the raw material is single, the preparation process is simple, the cost is low, the repeatability is good, the yield is high, the obtained ceramic material has giant dielectric performance, and the preparation method is suitable for industrial production. The (Mg + Nb) co-doped TiO2 novel giant dielectric ceramic can meet the requirements of a dielectric material with high dielectric constant, low dielectric loss and good temperature and frequency stability, and compared with other widely applied giant dielectric materials, the titanium dioxide-based giant dielectric ceramic has the characteristics of simplicity in preparation and excellent dielectric property.

The invention relates to the technical field of cell biology, in particular to an iNKT cell cryopreservation solution and a method for cryopreserving iNKT cells by using the cryopreservation solution. The invention provides an immune cell cryopreservation solution. The immune cell cryopreservation solution comprises human serum albumin, a basic low-temperature protection solution and an optional human platelet lysate. The immune cell freezing medium does not contain animal-derived components except for human bodies, and has the advantages of simple components and good stability. According to the cryopreservation liquid disclosed by the invention, through the combined action of the basic low-temperature protection liquid (such as CryoStor10 (CS10)) and the human serum albumin, the motility rate after cell recovery is improved, and the damage to immune cells (such as iNKT) in the cryopreservation process is reduced. After a small amount of human platelet lysate is further added, the survival rate of cell resuscitation and the amplification capacity can be further improved.

The invention discloses a process for preparing a V2O3 / ZnV2O3 total battery by simultaneously using vanadium oxide in a zinc ion battery as a positive electrode material and a negative electrode material, which comprises the following steps: reacting ammonium metavanadate with absolute ethyl alcohol by adopting a solvothermal synthesis method, washing, drying, and calcining in a tubular furnace to obtain V2O3; in the preparation process of the V2O3 positive electrode material, only V2O3, acetylene black serving as a conductive agent and PVDF serving as a binder are mixed in proportion and then are coated on graphite paper, other coating protection materials do not need to be introduced into a V2O3 / Zn negative electrode, and V2O3 is used as a protection layer to inhibit growth of zinc dendrites, relieve hydrogen evolution side reaction of the zinc negative electrode and reduce corrosion of zinc. Vanadium oxide V2O3 is directly used as a core positive electrode material, the zinc negative electrode coating is developed by utilizing the characteristics of the vanadium oxide V2O3, a material is formed, meanwhile, the performance optimization of the positive electrode and the negative electrode is realized, the used raw materials are simple and easy to obtain, the process is simple and easy to implement, and the preparation process is simple and easy to implement from V2O3 raw material synthesis to positive and negative electrode piece preparation to V2O3 / ZnV2O3 total battery assembly. And comprehensive improvement of positive and negative electrode performances of zinc ions is simultaneously realized by a single material.

The invention discloses an anti-LRP4 antibody and an application thereof. The heavy chain CDR1-3 is shown as SEQ ID NO: 2-4 in sequence, and the light chain CDR1-3 is shown as SEQ ID NO: 6-8 in sequence. The anti-LRP4 antibody can be effectively used for cell or tissue sample LRP4 antigen detection (such as immunofluorescence detection) or immunoblotting analysis, and can be used as a positive standard product of the anti-LRP4 antibody detection kit, the same set of anti-human fluorescent secondary antibody is directly used, and the component composition of the detection kit is simplified.

The invention relates to the technical field of preparation of lead-free metal halide scintillator crystal powder, and particularly discloses chlorine zirconium cesium crystal powder for a composite scintillator and a confinement growth method of the chlorine zirconium cesium crystal powder. The cesium zirconium chloride crystal powder is cesium zirconium chloride-gas phase oxide composite powder formed on the micro-nano scale by means of in-situ crystallization, and the cesium zirconium chloride crystal powder is composed of 50-95.3 wt% of cesium zirconium chloride and 4.7-50 wt% of gas phase oxide. The preparation method comprises the following steps: preparing zirconium chloride-gas phase oxide powder, preparing a cesium chloride solution, mixing zirconium chloride-gas phase oxide slurry, and growing chlorine zirconium cesium crystal powder in an in-situ crystallization confinement range. The cesium zirconium chloride crystal powder prepared by the method has the advantages of adjustable particle size, stable suspension and efficient scintillation luminescence performance, solves the problem of crystal powder-polymer phase separation in a composite scintillator, and can be used for large-scale preparation of the composite scintillator in the field of radiation detection.

The application provides a quantum dot microsphere fluorescent immunochromatography test paper for combined detection of ASFV antibodies and nucleic acids and an application thereof, and belongs to the technical field of veterinary biological diagnosis products. The quantum dot microsphere fluorescent immunochromatography test paper for combined detection of ASFV antibodies and nucleic acids comprises a base plate, on the base plate, a sample pad, a combination pad, a nitrocellulose membrane and a water absorption pad are sequentially connected in a head-to-tail mode, from the combination pad to the water absorption pad, the nitrocellulose membrane is sequentially provided with an antibody detection line, a nucleic acid detection line and a quality control line, the antibody detection line is coated with a goat anti-pig IgG-Fc antibody, the nucleic acid detection line is coated with streptavidin, and the quality control line is coated with a rabbit anti-sheep IgG antibody; the combination pad is coated with a quantum dot microsphere labeled recombinant protein P22 and a quantum dot microsphere labeled sheep anti-digoxin antibody. The test paper can rapidly, highly specifically and highly sensitively detect ASFV antibodies and nucleic acids.

The invention belongs to the field of organic functional molecules and organic polymer functional materials, and particularly relates to a reactive aggregation luminescent flame-retardant organic functional material and a preparation method thereof. A flame-retardant group DOPO is introduced into molecules containing an aggregation-induced emission TPE group, the flame-retardant group DOPO which simultaneously contains the TPE group with aggregation-induced emission performance and a flame-retardant function in the structure is designed and synthesized, and the flame-retardant group DOPO has good flame-retardant performance while the aggregation-induced emission function is guaranteed.

The application provides a kind of lure bait and its preparation method, the lure bait is prepared from the following components by weight parts: wheat flour 5-15 parts, pig blood 1-5 parts, powder 1-2 parts, sugar 10-20 parts, trimethylamine oxide 0.5-2 parts, fishy powder 0.5-1 part, and water in appropriate amount; the powder is konjac flour and / or pea powder.The specific preparation method is as follows: first, bake the wheat flour to full ripeness, add pig blood and stir to obtain mixture I; then, add water to the konjac flour and stir to a viscous state, add mixture I and heat to stir to obtain mixture II; after adding sugar to mixture II until the sugar is completely dissolved, add trimethylamine oxide and fishy powder and stir to obtain mixture III; finally, place mixture III into a mold, heat and shape to obtain the lure bait.The lure bait prepared by the application has the advantages of easy-to-obtain raw materials, simple preparation method, deep red color, fishy smell, shiny surface, slow dissolution in water, and can attract fish well and hook fish.

The invention discloses a high-salt salted duck egg yolk hard core softening processing technology, and belongs to the technical field of salted duck egg preparation.The salted duck egg yolk prepared through the technology is soft and fine in yolk, easy to melt in the mouth and high in oil extraction rate, meanwhile, raw materials are simple, only water and salt are contained, and the salted duck egg yolk is soft, fine and smooth. The prepared salted duck eggs do not contain harmful substances, the pickling time is short, and the process is simple to operate.

The application provides a Bi2O2CO3-MIL-68(In) heterojunction composite material and a preparation method and application thereof, and belongs to the technical field of photocatalytic materials, the field of persulfate catalysis and the field of environmental governance. The composite material is obtained by loading Bi2O2CO3 on the surface of MIL-68(In) to form a Z-type heterojunction structure; the Bi2O2CO3 is a spherical body with a diameter of 200-500 nm, and the surface is a stacked granular structure; the MIL-68(In) is a regular hexahedral rhombic rod-shaped structure with a particle size of 5-10 mu m, and the Bi2O2CO3 is dispersedly loaded on the surface of the MIL-68(In). The application has the advantages of simple operation, strong visible light absorption capacity of the heterojunction material, stable photocatalytic performance, high degradation efficiency and the like, and has a potential application prospect in the field of photocatalytic persulfate.

The application relates to the technical field of sterilization and disinfection, in particular to a long-acting antibacterial composition for hard surfaces and application and use method thereof. The antibacterial composition is composed of a polymer precursor and a polymer base molecule in a molar ratio of 1:(100-200); the polymer precursor is obtained by modifying one or more of amino groups, hydroxyl groups, double bonds, siloxanes and isocyanate groups on the basis of a photodynamic molecule; the photodynamic organic molecule is one or more of porphyrin, metal porphyrin, dihydrogenophorin, phthalocyanine, fluorinated boron dipyrrin, pyrrolopyrrole diketone, cyanine dye, coumarin, benzophenone, isoazoline, riboflavin and ring metal complex and derivatives thereof. The application mainly realizes the long-acting antibacterial effect by depositing the photodynamic functional organic molecule on the hard surface and forming a stable coating structure, and the coating structure has very strong hardness.

This invention discloses a topologically oriented cyclodextrin / chitosan composite membrane, its preparation method, and its applications, belonging to the field of bio-based nanomaterials technology. Using α-cyclodextrin and polyethylene glycol (PEG) as raw materials, this invention prepares topologically oriented cyclodextrin-PEG "ring-slippery" nanoparticles (TNPs). TNPs, as green and biodegradable nanoparticles, fill the chitosan network matrix, enhancing hydrogen bonding interactions with chitosan molecules and improving the mechanical properties of the chitosan membrane. This method not only uses simple raw materials and is easy to implement, but also effectively improves the mechanical strength of the chitosan composite membrane, effectively overcoming the problem of poor mechanical strength in existing chitosan composite membranes, and providing a simple and effective approach for practical production.

The invention discloses a polyurethane emulsion for UV (ultraviolet) ink-jet digital printing as well as a preparation method and application of the polyurethane emulsion. The preparation method of the polyether type polyurethane emulsion comprises the following steps: adding polyether polyol, isocyanate, a catalyst and polyfunctional group acrylate into an organic solvent, mixing and uniformly stirring, heating to a first temperature, and stirring for reaction to obtain a polyether type polyurethane solution; and cooling to a second temperature, sequentially adding deionized water, adjusting the pH value, and uniformly mixing to obtain the water-based polyether polyurethane emulsion. The low-polarity polyether polyurethane is selected as a main body material, the polyfunctional group acrylate is introduced to increase the binding force between the ink and the main body, the compatibility among the components can be improved, the leveling property of the UV ink can be improved, a high-quality cured film layer can be formed without additionally adding a leveling agent, the internal stress during UV curing film forming is reduced, and the UV curing film forming quality is improved. Therefore, surface defects such as white points and pinholes caused by shrinkage of film holes in the UV curing process are avoided.

The application belongs to the field of rare earth smelting, and particularly discloses a preparation method of low-chlorine precipitated lanthanum carbonate, which comprises the following steps: preparing a precipitant, a mixed solution of sodium bicarbonate and sodium carbonate and an additive A; adding bottom water and crystal seeds into a reaction tank; preparing a material solution, adding an additive B into the lanthanum chloride material solution; under heating, the precipitant and the material solution are added into the reaction tank in a parallel flow mode; after the reaction is completed, the precipitate is filtered out and washed with clean water for more than five times, and the obtained product is placed into an oven for drying. The obtained product is the low-chlorine precipitated lanthanum carbonate with REO of 52-56%, chlorine ions of 0.005%-0.015% and calcium ions less than 0.015%. The preparation method has the advantages of simple process and convenient operation, and can prepare the low-chlorine and low-calcium lanthanum carbonate from the high-concentration and high-calcium-content lanthanum chloride material solution used in industrial production; and the precipitated lanthanum carbonate has very low contents of chlorine ions and calcium ions, and can meet the requirements of the La2O3-4N grade in the national standard GB / T 4154-2015 after calcination.

The invention provides a jujube fruit cracking prevention film agent as well as a preparation method and a use method thereof.The jujube fruit cracking prevention film agent is prepared from the following raw materials in parts by mass: 1-5 parts of a polyvinyl alcohol solution, 1-5 parts of a polyacrylamide solution and 0.5-1 part of a modified oxidized humic acid solution; wherein the polyvinyl alcohol solution is prepared from the following components in parts by mass: 1 to 5 parts of polyvinyl alcohol, 0.1 to 0.5 part of cross-linking agent and 50 to 120 parts of water; the polyacrylamide solution is prepared from the following components in parts by mass: 1 to 5 parts of polyacrylamide, 0.1 to 1 part of hydrophobic monomer and 80 to 150 parts of water; the modified oxidized humic acid solution is prepared from the following components in parts by mass: 1 to 2 parts of modified oxidized humic acid, 0.05 to 0.1 part of calcium salt, 0.05 to 0.1 part of phosphorus salt, 0.05 to 0.1 part of silicon fertilizer, 0.05 to 0.1 part of borax, 0.05 to 0.1 part of growth promoting agent and 30 to 80 parts of water. The jujube fruit cracking prevention film agent can prevent jujube fruit cracking.

The present application belongs to the technical field of virus prevention and control of plants, and particularly relates to a formula of an elicitor for Passiflora edulis EAPV and TeMV and an application method thereof. The elicitor is composed of sophoramine and ginsenoside Rh2, and the preferred concentration is 160 mg / L for each. The results of a pot experiment show that the virus content of TeMV and EAPV in Passiflora edulis plants is significantly lower than that of the water control, the virus index is 33.12, and the relative control effect reaches 65.57%, which is better than that of a commercial plant immune elicitor "A Tailing". In a field experiment, the preferred application method is adopted, i.e. spraying once at the seedling stage of 4-5 leaves and at the end of flowering and the beginning of fruiting, and the disease index at the harvest stage is 23.15, and the relative control effect reaches 72.30%, which is significantly better than that of "A Tailing", and the leaves of the treated plants are flat and smooth, and have few disease spots. The safety experiment shows that the concentration of 160 mg / L has no adverse effect on Passiflora edulis. The present application has simple components, easily available raw materials, low cost, simple operation, only two times of spraying, and has a good application prospect.

This invention belongs to the field of crystal material preparation technology, and particularly relates to a chiral heterometallic oxy-cluster material and its preparation method. The method includes the following steps: reacting a metal-organic cage with a chiral ligand and a heterometallic compound via a solvothermal reaction to obtain the chiral heterometallic oxy-cluster material; wherein the metal-organic cage is selected from at least one of PTC-101, PTC-101(Zr), and PTC-102(Hf), and the heterometal is selected from one or more of calcium, copper, and zinc. The preparation method of this invention is simple and can synthesize high-purity materials in large quantities.

This invention relates to a method for separating magnesium and lithium in salt lake brine and its application, relating to the field of efficient and clean utilization of salt lake resources and modern salt chemical technology. This separation method constructs a precise selective magnesium precipitation window, allowing magnesium to precipitate deeply in the form of carbonates, while lithium remains largely in solution, thereby achieving the separation and removal of magnesium from high-magnesium brine. The magnesium precipitate obtained through online solid-liquid separation has a consistently low Mg / Li mass ratio below 1.0 × 10⁻⁶. ‑2 Subsequently, the filtrate is efficiently crystallized and recovered from lithium carbonate via co-ion effect or concentrated pyrolysis at higher temperatures (T2 = 85–100 °C) and lower pCO2. This invention achieves a highly efficient closed-loop cycle of NH3 and CO2, and has the advantages of strong universality, high selectivity, low cost, and environmental friendliness.

The invention discloses a process for high-temperature harmless treatment of overhaul slag. The aluminum electrolysis overhaul slag is crushed and mixed with sodium carbonate and calcium carbonate, the sodium carbonate reacts with the overhaul slag at the high temperature to convert a fluorine-containing compound into soluble fluoride, meanwhile, the calcium carbonate is mixed at the high temperature, the soluble fluoride is converted into CaF2, and the fluorine curing effect is achieved. The method can effectively solve the problem of safe disposal of dangerous waste residues generated by electrolytic aluminum, so that the dangerous waste residues meet the environmental protection requirement, and the purpose of comprehensive and harmless treatment of the electrolytic aluminum overhaul waste residues is achieved.

The application discloses synthesis of a novel Schiff base gold (III) compound and antibacterial application thereof, and belongs to the technical field of medicine preparation; gold sodium aurothiomalate has significant antibacterial activity, but the Au-S bond thereof is easily broken by intracellular reducing thiol, and the gold sodium aurothiomalate is metabolized before reaching a target point to produce toxic side effects; based on the gold sodium aurothiomalate, developing a gold compound with stronger stability is one of strategies for overcoming drug-resistant bacteria; the Schiff base itself has antibacterial activity, and after being combined with gold (III) ions, the Schiff base can stabilize gold atoms and improve the activity of the gold atoms; in vitro antibacterial activity shows that Au6 and Au13 have significant antibacterial advantages on carbapenem and polymyxin-resistant Klebsiella pneumoniae, the minimum inhibitory concentration (MIC) is 10 micromoles, and the antibacterial activity is at least 16 times higher than that of the gold sodium aurothiomalate; in vivo antibacterial activity experiments prove that Au6 and Au13 can reduce mouse skin infection and promote wound healing, and can prolong the survival time of abdominal infection mice, and have important practical application value.

This invention discloses a high-strength, high-toughness steel for marine engineering equipment with excellent work hardening ability and its manufacturing method. The steel's chemical composition by weight percentage is: C = 0.08%–0.15%, Si = 0.10%–0.20%, Mn = 0.50%–1.00%, Ni = 0.30%–0.80%, Cr = 0.50%–1.50%, Mo = 0.10%–0.50%, Cu = 0.10%–0.50%, Nb or V = 0.02%–0.04%, and Al = 0.05%–0.08%. The composition is as follows: B = 0.0005%~0.0015%, Ti ≤ 0.01%, N ≤ 0.005%, P ≤ 0.010%, S ≤ 0.006%, with the remainder being Fe and unavoidable impurities. The technical solution of this invention adopts direct quenching after hot rolling and tempering heat treatment to obtain a multiphase structure of tempered martensite, restored ferrite and carbides. The work hardening rate during the deformation stage from yield strength to tensile strength is higher than 5000MPa, the yield strength ratio is lower than 0.90, the yield strength is higher than 690MPa, and the Charpy impact energy at -60℃ is higher than 150J.

The application belongs to the technical field of nanocomposites, and particularly relates to a macroporous nanosilica composite material and a preparation method thereof. The macroporous nanosilica composite material comprises nanomacroporous silica and a lubricating additive loaded in the silica material; the nanomacroporous silica has a particle size of 50-110 nm and a pore size of 3-30 nm. The application optimizes and adjusts raw materials and a preparation process, so that the nanosilica composite material has excellent tribological and lubricating properties and can meet the application requirements in the self-lubricating field. The preparation method of the application has simple raw materials, mild process conditions, and no need for complex equipment, and is very convenient for industrial production. The preparation method of the application is simple in operation, low in production cost, and suitable for industrial production. The prepared product has certain stability, excellent lubricating property, and wide application range.

This invention relates to the field of oilfield chemistry, and discloses an oil displacement composition and an oil displacement agent, as well as their applications. The oil displacement composition comprises component A and component B, wherein component A has the structure shown in Formula I, and component B has the structure shown in Formula II; wherein R1 is a C1-C8 alkanol or a C6-C8 aromatic alcohol; PO is a polyoxypropylene segment; EO is a polyoxyethylene segment; m = 1-30; n = 1-15; Y ‑ R1 is an acid radical ion; M is an alkali metal or alkaline earth metal; R2 is a C1-C8 alkyl group or a C6-C8 aryl group. The oil displacement agent prepared from the oil displacement composition of this invention can be used in chemical oil displacement. This oil displacement agent is an ultra-low interfacial tension spreading type oil displacement agent, with simple composition, good solubility, and cost advantage. R1-O-(PO) m -(EO) n -Y ‑ M + Formula I; R2-OH Formula II.

This invention provides a rigid polybutylene succinate (PBS) biodegradable sheet and its preparation method. The biodegradable sheet comprises, by weight: 40-55 parts PBS, 40-50 parts core-shell composite material, 3-5 parts polylactic acid (PLA), 1-2 parts compatibilizer, 0.3-0.5 parts lubricant, and 0.5-1.0 parts nucleating agent. This invention utilizes anhydride to mechanically modify starch under dry conditions, causing esterification and anhydride adhesion to the surface of starch particles. Low molecular weight PBS is then extended and anchored onto the surface of the starch particles via hot-melt extrusion to form a core-shell composite material. This core-shell composite material significantly increases rigidity, prevents starch particles from being exposed, and exhibits excellent compatibility with the PBS matrix. The prepared sheet does not swell or precipitate after boiling. This production technology uses simple raw materials, the hot-melt extrusion equipment is suitable for large-scale production, the biodegradable sheet has a high starch content, and the overall cost is low.

The application provides a method for long-term in-vitro culture and expansion of primary hepatocytes and application thereof. The method for in-vitro culture and expansion of primary hepatocytes comprises using a culture medium containing interleukin-22 (IL-22), combined with hepatocyte growth factor (HGF) and / or epidermal growth factor (EGF) to induce primary hepatocytes to prepare proliferative liver precursor cells. The application combines interleukin-22 (IL-22), hepatocyte growth factor (HGF) and / or epidermal growth factor (EGF) to induce in-vitro mass expansion of primary hepatocytes, and through the method, mature-like hepatocytes with a gene expression profile extremely similar to that of primary hepatocytes and perfect functions can be obtained, and the hepatocytes expanded by the method have good in-vivo therapeutic effects.

This application belongs to the field of battery technology and discloses a method for etching the copper seed layer of a copper-grid heterojunction solar cell, an etching solution, and its application. The etching solution consists of dilute sulfuric acid solution, ozone, and water, with the concentration of the dilute sulfuric acid solution being 0.6%-10% and the ozone concentration being 10-30 ppm. The solar cell containing the copper seed layer or the silicon wafer of a heterojunction solar cell containing an ITO film is completely immersed in the etching solution and etched at room temperature to remove the copper seed layer from the surface of the silicon wafer. The etching solution described in this technical solution is used to remove the copper seed layer in copper-grid heterojunction solar cells. It has a simple composition, and the waste liquid after etching is a copper sulfate solution with no harmful byproducts, making it environmentally friendly. The ozone is generated on-site from air or oxygen, and the sulfuric acid concentration is extremely low, reducing the cost of chemical solutions by more than 60% and resulting in extremely low overall operating costs. This system causes very little damage to transparent conductive films such as ITO and SnO2, and the sheet resistance and film thickness change rate can be controlled within 3%, ensuring the performance of the solar cell. Compared with other oxidant etching solutions, it avoids the etching capacity decay defects caused by oxidant decomposition.

This invention discloses a creatine kinase detection kit that counteracts lipemia interference and its preparation method. The kit includes reagent R1 and reagent R2; reagent R1 includes: purified water, imidazole, MgAC, and EDTA Na. 2 Glucose, PC300, Na 2 SO 3 N-acetylcysteine, NADP, AMP, ADP, AP5A, HK, and surfactant; reagent R2 includes: pure water, Capso, creatine phosphate, PEG6000, and NaN. 3 The kit contains BSA and G6PDH. The surfactant is one or a combination of two of Triton 100 and Tween 80. Through the synergistic effect of PEG6000 and the two surfactants Triton 100 and Tween 80, the creatine kinase detection kit significantly improves its resistance to lipemia interference and enhances its detection accuracy. The kit is simple to prepare, has strong resistance to lipemia interference, simple components, and low preparation cost, making it highly promising for market application.

The invention provides a vincristine sulfate injection and a preparation method thereof, and relates to the technical field of pharmaceutical preparations. The preparation method of the vincristine sulfate injection comprises the following steps: (1) adding vincristine sulfate and rosmarinic acid into an acetate buffer solution, uniformly stirring and mixing, filtering, collecting powder, drying, grinding and sieving to obtain a vincristine sulfate-rosmarinic acid eutectic; (2) adding mannitol into the water for injection for later use; and (3) adding the vincristine sulfate-rosmarinic acid eutectic into the system in the step (2), stirring, adjusting the pH value to 4.5-5.5, filtering with a microporous membrane, sterilizing, and filling to obtain the vincristine sulfate injection. The vincristine sulfate injection disclosed by the invention is simple in preparation process, good in reproducibility and easy for industrial production. The vincristine sulfate injection has the advantages of simple raw materials, no need of any synthetic carrier material, definite components and high safety, and the prepared vincristine sulfate injection has high stability and good application prospects.

The application belongs to the technical field of biological stimulants, and particularly discloses a composition containing phaeodactosan and a preparation method and application thereof. The composition containing phaeodactosan contains 0.08-0.12 g / L of phaeodactosan and 0.1-0.5 g / L of Lactobacillus pentosus extracellular polysaccharide, and the Lactobacillus pentosus extracellular polysaccharide is prepared by fermentation of Lactobacillus pentosus. The composition can effectively promote fruit color change and sweetness increase of crops.